From: Andy Lutomirski <luto@kernel.org>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: Greg KH <gregkh@linuxfoundation.org>,
Daniel Wagner <wagi@monom.org>,
David Woodhouse <dwmw2@infradead.org>,
jewalt@lgsinnovations.com, rafal@milecki.pl,
arend.vanspriel@broadcom.com,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
yi1.li@linux.intel.com, atull@opensource.altera.com,
moritz.fischer@ettus.com, Petr Mladek <pmladek@suse.com>,
Johannes Berg <johannes.berg@intel.com>,
Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
Luca Coelho <luciano.coelho@intel.com>,
Kalle Valo <kvalo@codeaurora.org>,
Andrew Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Kees Cook <keescook@chromium.org>,
AKASHI Takahiro <takahiro.akashi@linaro.org>,
David Howells <dhowells@redhat.com>,
Peter Jones <pjones@redhat.com>,
Hans de Goede <hdegoede@redhat.com>,
Alan Cox <alan@linux.intel.com>, "Ted Ts'o" <tytso@mit.edu>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Martin Fuzzey <mfuzzey@parkeon.com>,
"stable # 4 . 0" <stable@vger.kernel.org>
Subject: Re: [PATCH v2] firmware: fix sending -ERESTARTSYS due to signal on fallback
Date: Wed, 24 May 2017 15:00:18 -0700 [thread overview]
Message-ID: <CALCETrXUrirO-vg3M+MGhn=0gZTwx0phsRDS4TCwWWgNYC6RsA@mail.gmail.com> (raw)
In-Reply-To: <20170524214027.7775-1-mcgrof@kernel.org>
On Wed, May 24, 2017 at 2:40 PM, Luis R. Rodriguez <mcgrof@kernel.org> wrote:
> From: Martin Fuzzey <mfuzzey@parkeon.com>
>
> Commit 0cb64249ca500 ("firmware_loader: abort request if wait_for_completion
> is interrupted") added via 4.0 added support to abort the fallback mechanism
> when a signal was detected and wait_for_completion_interruptible() returned
> -ERESTARTSYS. Although the abort was effective we were unfortunately never
> really propagating this error though and as such userspace could not know
> why the abort happened.
Can you give a simple example of what's going on and why it matters?
ERESTARTSYS and friends are highly magical, and I'm not convinced that
allowing _request_firmware_load to return -ERESTARTSYS is actually a
good idea. What if there are system calls that can't handle this
style of restart that start being restarted as a result?
next prev parent reply other threads:[~2017-05-24 22:00 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-23 13:16 [PATCH] firmware: request_firmware() should propagate -ERESTARTSYS Martin Fuzzey
2017-05-23 13:31 ` Greg Kroah-Hartman
2017-05-23 14:32 ` Martin Fuzzey
2017-05-23 19:55 ` Luis R. Rodriguez
2017-05-24 20:56 ` Luis R. Rodriguez
2017-05-24 21:40 ` [PATCH v2] firmware: fix sending -ERESTARTSYS due to signal on fallback Luis R. Rodriguez
2017-05-24 22:00 ` Andy Lutomirski [this message]
2017-05-24 22:38 ` Luis R. Rodriguez
2017-05-25 4:13 ` Andy Lutomirski
2017-05-25 8:28 ` Fuzzey, Martin
2017-05-26 11:09 ` Eric W. Biederman
2017-05-26 19:46 ` Luis R. Rodriguez
2017-05-26 21:26 ` Dmitry Torokhov
2017-05-26 21:32 ` Luis R. Rodriguez
2017-05-26 21:55 ` Dmitry Torokhov
2017-06-05 20:24 ` Luis R. Rodriguez
2017-06-06 9:04 ` Martin Fuzzey
2017-06-06 16:34 ` Luis R. Rodriguez
2017-06-06 17:52 ` Luis R. Rodriguez
2017-06-06 14:53 ` Alan Cox
2017-06-06 16:47 ` Luis R. Rodriguez
2017-06-06 17:54 ` Luis R. Rodriguez
2017-06-06 22:11 ` Theodore Ts'o
2017-06-07 0:22 ` Luis R. Rodriguez
2017-06-07 4:56 ` Andy Lutomirski
2017-06-07 6:25 ` Dmitry Torokhov
2017-06-07 12:25 ` Alan Cox
2017-06-07 17:15 ` Luis R. Rodriguez
2017-06-09 1:14 ` Andy Lutomirski
2017-06-09 1:33 ` Luis R. Rodriguez
2017-06-09 21:29 ` Luis R. Rodriguez
2017-05-26 19:40 ` Luis R. Rodriguez
2017-05-26 20:23 ` Fuzzey, Martin
2017-05-26 20:52 ` Luis R. Rodriguez
2017-06-07 17:08 ` Luis R. Rodriguez
2017-06-07 17:54 ` Martin Fuzzey
2017-06-09 1:10 ` Luis R. Rodriguez
2017-06-09 1:57 ` Luis R. Rodriguez
2017-06-09 7:40 ` Martin Fuzzey
2017-06-09 21:12 ` Luis R. Rodriguez
2017-06-09 22:55 ` Luis R. Rodriguez
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